These disks are formatted as simple individual volumes (NO RAID) but are encrypted (I have a key).

I think, this would be the problem. I don't know how QNAP encrypts data.
R-Linux may see a partition structure, you may try R-Linux for free. Maybe, it'll be better to work under Linux, maybe it can decrypt the disks somehow.

"Alt" I tried to run r-Linux (and even r-Studio) on both Windows and Linux.
I can visualize the volumes and the partitions but I cannot access them, probably because they are encrypted. But I can't find the possibility to mount and / or scan the partition by giving the decryption key. Am I wrong in something?

r-Linux.png

"Data-Medics" I will try to investigate what you wrote to me in the hope of finding something. Unfortunately I'm not a big Linux freak and this limits me. If you have more detailed info I can only thank you.
Thanks so much to you both.

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